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 1 
 on: Today at 03:49:06 AM 
Started by Dan Snow - Last post by Dan Snow
No flight report yet, sorry.
Loaded everything up early Sat morning, but by the time I got to the field the wind was blowing 10-15mph, way to high for attempting virgin trimming flights as far as I was concerned, But also, and more important, the farmer had moved part of his herd into the field we use.
Will try again this coming weekend.

 2 
 on: Today at 03:45:50 AM 
Started by Dan Snow - Last post by Dan Snow
Just in case anyone was wondering, the CR3 is on hold while I await the new printed tissue I ordered for the bird.  After spending quite some time on it I'm not unhappy with the cowl, but there are a lot of wrinkles elsewhere I want to remove.

 3 
 on: August 02, 2021, 08:36:48 PM 
Started by danmellor - Last post by Dick in Silver Creek
You probably know this already, but the WingnutWings website is a real treasure trove of more details on WWI airplanes than you can imagine. WNW had some of the finest and best researched WWI plastic aircraft kits ever offered, all in 1/32 scale. They're now out of business, presumably because of COVID, but their website is still active. The site has archival photos, Ronny Barr profiles and highly detailed instructions, with reference photos, of every model in their extensive line.

Here's a link to their Sopwith Triplane. There's a separate link for Raymond Collishaw's Black Maria.

http://www.wingnutwings.com/ww/productdetail?productid=3039&cat=4

Love your model.

Dick in Silver Creek

 4 
 on: August 02, 2021, 06:50:49 PM 
Started by flyfac - Last post by flyfac
Thank you Dick!

You are most generous and your terms are fair and reasonable!

I've sent you a private message with my snail mail address.

Best,

Scot Dobberfuhl
Forest Grove, OR

 5 
 on: August 02, 2021, 06:16:16 PM 
Started by Don McLellan - Last post by Sky9pilot
Great looking buck for the canopy Don.  I love your tear repair tip.  Thanks!

 6 
 on: August 02, 2021, 06:11:46 PM 
Started by flyfac - Last post by Dick in Silver Creek
I have the HiLine Micro-4 motor system in its original package, never used. I assume it's still OK, but not so sure about the batteries.
I would be happy to send this to you at no charge. Lots better than letting it stay in the drawer. At this point, I'm never use it.
All I ask is for you to finish up the model and post some in-flight pictures.

Dick in Silver Creek
Dick Schulenberg, Silver Creek, NY

 7 
 on: August 02, 2021, 05:52:47 PM 
Started by Don McLellan - Last post by alfakilo
Don...thanks much for the info. I'll try it out the next time I poke a hole where it shouldn't be!!

 8 
 on: August 02, 2021, 04:08:49 PM 
Started by danmellor - Last post by danmellor
Thanks all! It's around this point that I start to get really, really worried as nothing's gone dreadfully wrong yet...

It's my eternal optimism that keeps me so happy. Ahem.

Dan.

 9 
 on: August 02, 2021, 01:51:53 PM 
Started by Ex Member - Last post by Kevin M
Sounds like a decent weight Chris, similar to my half-size Ace (15") at the same stage, which as Bill D remarked is almost a backwards Elf.

 10 
 on: August 02, 2021, 01:44:36 PM 
Started by Ex Member - Last post by Squirrelnet
Not sure how much these should weigh but the basic structure so far is 3.9g


 11 
 on: August 02, 2021, 01:02:16 PM 
Started by DerekMc - Last post by atesus
Well Damn!!  Angry
For only the 2nd time this year I loaded up the truck and headed to Waegall Field, our local site.
I had 4 to trim, IL-2, Skiptown Mystery, Broussard and Howard Littmans Double Trouble. I also had a repaired MO-1 from this years Nassise cookup, and my Mauboussin Hemiptere from last year.

15 minute or so drive to the field, virtually calm when I left the house, and blowing a good 10mph+ by the time I got there. And of course the owner decided to run his cows in the field we use.  Sigh!! Temps supposed to be back up around 100 tomorrow.

Dang it!

Sorry to hear that. The winds were manageable in Novato.

150gm...
https://ibb.co/F5wx1ZW

Beautiful structure!

 12 
 on: August 02, 2021, 12:12:39 PM 
Started by Ex Member - Last post by TheLurker
I shall have to fit a wider door to my study. Smiley

IndoorFlyer>...With a modest enlargement factor, the Elf becomes compliant with the FAC Embryo...
I've got other odds and ends I want to get on with, but if you want the donkey work I can let you have the SVG and DXF (AutoCad V14 I think) files so that you can muck around rescaling it "correctly" and tack on the extra bits for the Embryo class.

A word of warning though, I'm using Inkscape which is a simple 2D vector graphics drawing tool rather than a fully fledged CAD app. so it's likely to take you a few hours to rescale things properly.  Oh and Inkscape does odd things with scaling for its DXF export.  If you're interested, send me a PM with your e-mail address.

Cheers,
Lurk.

 13 
 on: August 02, 2021, 12:02:59 PM 
Started by hklam - Last post by TheLurker
Quote from: martynk
That looks fab. 
+1

 14 
 on: August 02, 2021, 11:06:18 AM 
Started by hklam - Last post by hklam
Thanks John! Hopefully it flies alright. Still many things left to be done before any test glides take place.

hklam

 15 
 on: August 02, 2021, 06:50:45 AM 
Started by Prosper - Last post by Prosper
Thanks for the advice, John and John. I was intending to do just that, OZPAF John - coarsen the pitch somewhat - but not increase power just yet, because I think the prop was wasting lots of energy the rubber was giving it. I didn't want to go straight back to the bigger blades without one or two more tweaks of the installed ones. I must say though that comparing videos, the model looked to me to be flying at a speed very similar to that of the test model, and I was slightly surprised at this, thinking that the very fine prop pitch would not permit the model to fly so fast.

Another thing I saw is that the right wing drops as the model speeds up - this is evident after each stall, even the gentle ones, and in fact proved deadly by setting the model straight for the tree. I guess that's the speed sensitivity of the ailerons, rather than right-thrust, yaw-induced wing drop: I don't see a yaw. I hadn't expected this because the good flight I mentioned in reply No. 342 orbited left only, with the same control settings - I expect because it wasn't stalling on that flight. Then I put on full turns, and. . .presumably. . .power stalls result. Anyway it was that which proved fatal, and I was rather kicking myself for not adjusting anything between flight 1 and 2, but there y' go - rushed - dusk - rare weather opportunity, etc.

The basic fact is that the model's bust though, and it might be some time before I can get it flying again.

Stephen.

 16 
 on: August 02, 2021, 05:46:53 AM 
Started by hklam - Last post by OZPAF
Impressive finish for such a light model.

John

 17 
 on: August 02, 2021, 05:11:05 AM 
Started by DerekMc - Last post by OZPAF
Very nice. Love the chair in the nose section.

John

 18 
 on: August 02, 2021, 04:58:39 AM 
Started by Prosper - Last post by OZPAF
Looking back through your flight videos Stephen, my impression is that the model is very speed sensitive. It flies smoothly until the speed has dropped and then dips into a shallow dive .

Perhaps a combination of more pitch with the reduced diameter blades (with extra power as well) for an overall faster flight?

John

 19 
 on: August 02, 2021, 04:35:19 AM 
Started by rgroener - Last post by ZIP.58
Thanks so much for sharing the pix - great to see. I did admire the garden tools winding stooge also!
cheers
Tim
Easy option for all types of soil. Holds and is made quickly. Typical for Andreas. Smiley

 20 
 on: August 02, 2021, 04:27:32 AM 
Started by Ex Member - Last post by Indoorflyer
Playing around with Lurker's nice CAD version of the Elf plan, I stumbled onto something interesting.  With a modest enlargement factor, the Elf becomes compliant with the FAC Embryo Endurance requirements...no tweaking of the design required.  (The stab area meets the "less than 50% of the wing area" req'mt)

The two "limiting" requirements are the minimum enclosed "box" dimensions, and the maximum wing area.  If you don't enlarge the plan "enough", the box is undersize in length and width.  If you enlarge the plan "too much" the wing area exceeds the 50 in2 limit.

Bottom line, if you print out the plan between  114.0% and 122.4% you get an "Embryelf"    Grin   Wingspan range is ~18" to 19.3" 

I really like the Elf's looks, and with wheel pants and 3D exhaust pipes, it would make a really attractive embryo, and earn the max bonus points. (The windscreen meets the "angle" requirement)  I would use the same wood sizes as indicated on the 1:1 plan; notches on the wing ribs would need to take that into account.

(for ref. I used a wingspan of 15.78" and a wing area of 33.34 in2  measured off Lurker's CAD plan)

 21 
 on: August 02, 2021, 04:26:59 AM 
Started by hklam - Last post by hklam
That looks fab.  How long did it take you to get to that stage? Do you sand the flying surfaces to an airfoil section?

--
Martyn




Thanks Martyn. No sanding done, this is 1mm thin depron which is already quite thin. Just some creases and bend slightly to airfoil shape.

hklam

 22 
 on: August 02, 2021, 04:20:49 AM 
Started by Don McLellan - Last post by OZPAF
That's a very neat repair Don. Typical of your tissue work!

John

 23 
 on: August 02, 2021, 04:13:54 AM 
Started by hklam - Last post by martynk
That looks fab.  How long did it take you to get to that stage? Do you sand the flying surfaces to an airfoil section?

--
Martyn


 24 
 on: August 02, 2021, 04:13:11 AM 
Started by stupid - Last post by OZPAF
I was a little careless when I did the first estimate of the Static Margin for the US Kid – using the default value for the tail efficiency.

On rechecking and comparing the results with my own CLG, I had found that a slightly higher value appeared more accurate – I used the same value for the US Kid and this produced a similar SM to that of my CLG – around 4% of the MGC.

I know this low SM works with my CLG and it would indicate that the US Kid would have similar response and stability in pitch.
The Cg on my CLG was established after a lot of testing and 45% is as far aft as it will tolerate for consistent performance.]

The tail volume on the US Kid is higher, but it has a CG of 47% MGC compared to 45% for mine. The dynamic stability (time to stabilize) may be higher for the US Kid and if so it could be superior in very turbulent conditions.

Thus it seems to me that the US Kid would be a good performer, as has probably already been established in practice – contrary to my first impression.
John

 25 
 on: August 02, 2021, 03:16:42 AM 
Started by hklam - Last post by hklam
This is where I am currently at. Let's hope it will fly alright at the end of everything! Grin


hklam

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